Researchers at Universal Display, developed an OLED device with plasmonic decay rate enhancement that dramatically increase device stability. By including a nanoparticle-based out-coupling scheme to extract energy from the plasmon mode, the researchers managed to maintain the device efficiency.

Stable plasmonic OLED structure and image, UDC

The device used an archetypal phosphorescent emitter to achieve a two-fold increase in functional stability at the same brightness as a reference conventional OLED device and extracted 16% of the energy from the plasmon mode as light.

The researchers out-coupled the light by randomly arranging silver nanocube on the silver cathode (separated by a dielectric layer). This design is called a plasmon nanopatch antenna (NPA). The plasmon NPA developed in this research (which differs from previously developed NPA designs) here achieved a nearly three-fold stability increase compared to a reference OLED device.